Air-brake system.



No. 869,364. PATENTED OCT. 29, 1907.

L. A. HAWKINS.

AIB. BRAKE SYSTEM. APPLIOATION FILED rnB.s,1eoe.

nioveil to nmiention-position and remains there until the auxiliary reservoir pressure has been lowered, by discharging oir in'o the hi'ake-eylinde mntll the pressures on opposite sides ot' the triple valve piston are equnlizefl. The triple vulve then returns to lnpq'nositioln in the usual umnner. Form1 emergency application, the switch is thrown toposition 3 and held there, there by Completely exhausting the elininber'on the trainpipe side or' the triple valve piston,.so as to hold the triple valve in einergenEy-application position, thereby producing equalization between auxiliary rosen voir nml brake-cylinder. To release, the switch S is moved lo position l, thereby opening brake-Cylinder to atmosphere, while maintaining the triple valve dis Connected ironi train-pipe, and consequently ign lapposilion. The release can be graduated by shifting the switch S to lap-position 2 at any time during release. For lull release the switch S is nioveil to the position shown in Fig. lli, thereby lenergizing all the magnets, reesL-ilrlishing the connection between trziinpipe und triple so ns to move the iriple vulve back to release-position.

By inf-zins. of the eliecli-vlve c in the "by-pass around the eleelricnlly-operated valve D, the triple valve muy be :returned pneunialienlly lo apply the brakes at any tinie, regardless oi the posiiion of the elee'lrie- :lily-operated vulve l). On the other hand, since, during electrica-l npplimition, the liuiiipipe pressure is grenier than lhepressure on the train-pipe Side of the triplo vulve piston, nml since the elieelexfolve c (loes notperinii the flow oi nir l'roin lutin-pipe triple vulve, the hyq'mqs connection (loes not affect ille application ol' the iii-:ricos electrically.

While'l have shown ille exlinusl vulve l) arranged iis in the Gnrpenter putent to (,-onneet the hnike-eyliinler to atmosphere independently ol lhe n particular zu'ritngmneni, o1'v lhe exhaust vulve is not essential to iny invention. ln phil-iol' this normally- Closed exhaust -valve iiulepi-iuleni oi llie lriph` vulve, n nornnillylopen exhaust. vulve triple vulve enh-must, zu; ehou'n in iruenl, No. o/-'i,0li2, llrll, Doeeiniier 29, 185W, nir-.y he employed, if desired. Aceonlingly, lilo not lv-Hire lo limit niyseli lo the purlriple valve, this.

nrningml lo Close thel I @aegee arrangement o parte here itliin the scope ol my invenclztirn as new and desire to secure by Letlers 'Eatent ol the United Stilles, is;

l. In an automatic airfbrzilie with' the trniwpipc` auxiliar brake-Cylinder, vulve ineeh "in, in eoznhinuiion oir, triple vulve, und disconnecting the ry reser. :i nifun i'o i' triple vulve from the twin-pille :intl l'or connecting the twin-pipe connection or' in :ind electro-magnetic operating' inemI for said vulve :mism adapted to Shift', 'blniii vulve nivchzinirun direction..

In an automatic nirl with the train-pipe, luxili h rnkecyluder, vulve ineen triple vulve from the train-pipe und kruin-pipe connection ei.' lh

electro-magnetic opel-:ximg menus for e triple rallye to ntniosplwre. mechA .in either )rake nwtein, in eolnliinnlon triple v ive, and for llisvunne. i; the

for eonneeling `ihe e lrinle vulve to nlinosphere. said vulve lueelnllfism, :L connection between irziinqiape und triplo vulve inflepenflent oi' Suid vulve ineel J smul eonneclion adapted lo pernul, he

:i eluck vulve in ilow of :iir only muisiu, und

from triple vulve to ti'ziin-pipe.

[n :in nuloinniie zlirlirnkt system, in

willi the trnin-pipe, :in ciln brult cylinder. vziivo to shii vulve.

Yl. ln un uuloinuiie with ille truiirpilw, :lum brake eyliniler, vulve meel triple vulve from ille ruiuqiipi connection oi' einetro-inngietie operntine' zinisui, n independent ol' snif] vulve smid connection nilnplm] 1.o

:Heil vulve controlling the ln-wilness whereof, i liu Llull (luy of Fehl'uury, 1h00.

nieeiiunisxn for triple valve from the Lrninqiipe and for (connecting lruinqiipe connectie-ns of triple vulve apply the brulaiw` eleelromugnetie operating; ineuns nclnptld sniil valve mechanism in either direction, :i vulve eonrrelliuf.;l the exlmust fron: the brake cylinder, mul elle lroiungnitie operating means for Suid. exhaust controllingr combina tion :1nd

ille

the

to nilnosphere to ry reh'ei'voir, Lrinle vulve disconnecting innisin for thidiseoniweline; iii-pipe und for connecting; the the trinle vulve lo nunosphere,

eonneelion between train-pipe :ruil lriple valve chvekwzil Vo in :iix' only unclinnisin, :i

pei-init ilu: (low fruin triplo vulve l'o kruin-pine, und :in elwtrloilly-operi-xlrnusl from the brake-cylindex'.

ve hereunto sei, luy lnuul fhi y Idil i il liNllI Ai li WhlNS.

aim in the zippentled claims lo cover all (ill 

